1 | import { factory } from '../../utils/factory';
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2 | import { deepMap } from '../../utils/collection';
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3 | import { log10Number } from '../../plain/number';
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4 | var name = 'log10';
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5 | var dependencies = ['typed', 'config', 'Complex'];
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6 | export var createLog10 =
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7 | /* #__PURE__ */
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8 | factory(name, dependencies, function (_ref) {
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9 | var typed = _ref.typed,
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10 | config = _ref.config,
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11 | _Complex = _ref.Complex;
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12 |
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13 | /**
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14 | * Calculate the 10-base logarithm of a value. This is the same as calculating `log(x, 10)`.
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15 | *
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16 | * For matrices, the function is evaluated element wise.
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17 | *
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18 | * Syntax:
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19 | *
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20 | * math.log10(x)
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21 | *
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22 | * Examples:
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23 | *
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24 | * math.log10(0.00001) // returns -5
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25 | * math.log10(10000) // returns 4
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26 | * math.log(10000) / math.log(10) // returns 4
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27 | * math.pow(10, 4) // returns 10000
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28 | *
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29 | * See also:
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30 | *
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31 | * exp, log, log1p, log2
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32 | *
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33 | * @param {number | BigNumber | Complex | Array | Matrix} x
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34 | * Value for which to calculate the logarithm.
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35 | * @return {number | BigNumber | Complex | Array | Matrix}
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36 | * Returns the 10-base logarithm of `x`
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37 | */
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38 | var log10 = typed(name, {
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39 | number: function number(x) {
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40 | if (x >= 0 || config.predictable) {
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41 | return log10Number(x);
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42 | } else {
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43 | // negative value -> complex value computation
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44 | return new _Complex(x, 0).log().div(Math.LN10);
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45 | }
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46 | },
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47 | Complex: function Complex(x) {
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48 | return new _Complex(x).log().div(Math.LN10);
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49 | },
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50 | BigNumber: function BigNumber(x) {
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51 | if (!x.isNegative() || config.predictable) {
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52 | return x.log();
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53 | } else {
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54 | // downgrade to number, return Complex valued result
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55 | return new _Complex(x.toNumber(), 0).log().div(Math.LN10);
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56 | }
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57 | },
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58 | 'Array | Matrix': function ArrayMatrix(x) {
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59 | return deepMap(x, log10);
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60 | }
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61 | });
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62 | return log10;
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63 | }); |
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